If it's worth saying, but not worth its own post, then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should start on Monday, and end on Sunday.
4. Unflag the two options "Notify me of new top level comments on this article" and "
That's beside the point, any user determined enough can create enough sock-puppets to be annoying, but I remember that you said that specifically in the case of Eugene there should have been a glitch that allowed him to create automatically multiple accounts. But the usual standard precaution here would suffice: captcha login and unique email verifications should be deterring enough.